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This is a warning and not an error, the battery is fully charged at the optimised voltage. The warning is only available with Pylontech US2000 batteries.

If your inverter is not communicating properly , it is important to reflash the CPU with the following software

You can download the latest version of WatchPower software through the below link to verify first.



Error 06 and error 57 may appear at the same time in an Axpert / Conversol MKS inverter with DUO MPPT at 12V. The following inverter has 1200W ac output power and charges 12v batteries from a dual MPPT charger.

If these errors appear on the LCD screen the inverter requires a new mainboard (inverter H-Bridge or switch mode power supply failed)

When a motor or a pump is connected to the inverter and feeds power back to the inverter then the error 60 will appear on the screen. In some conditions, the motors will start operating as a generator (when braking for example). If the current sensor of the inverter will detect any power flowing towards the inverter will signal error 60

Error 08 will appear on the LCD screen of the inverter if the generator spikes an over voltage at the AC input terminals.

If the generator is not properly sized (a small generator for example 3Kw connected to a 5kW off-grid inverter will cause a surge current or voltage that may damage permanently the main board).

How to solve the problem.

  1. Disconnect the AC input from the inverter and run the system with solar panels and battery only.
  2.  If the error is cleared then you have to check the parameters of the generator
  3. Connect the right SPD (surge protection device) at the AC input of the inverter.

If the error persists, you have to contact our technical team to arrange a repair. Most likely the main inverter board is damaged.

The inverter with an integrated AC-charger timer will reset the time settings to 00:00 if the user enters menu 01 or 16, the settings of the charger-timer will go back to default.

Even without modifying the values in menus 01 and 16, the timer will still go back to 00: 00 hours.

REMEMBER: Always set the timer again to the desire hours if you alter the critical menu 01 (output priority) and 16 for charger priority.

Model affecteds: Conversol Axpert 8kW Max, 8kW MAX-II, 7.2kW, Conversol V7, MV5000, Axpert King I

1. To make sure the inverters could work with the DG, he needs to configure Program 1 to UTI. Under this mode, the inverter would work in Bypass mode. If the inverters could accept the DG as AC grid input, the inverter would charge the battery and provide the output from DG directly.

2. If item 1 is confirmed then it means the inverters would work with that DG. According to the setting proposals from Pylontech, he would need to change the Program 26/27 to 53.2 Vdc. The rest configurations are OK. I would like to remind you that with the below configurations, the inverter would work in inverter mode (without using the AC grid) when the battery voltage is within 48-51Vdc. The inverters would only work with the DG after the battery voltage is less than 48Vdc but the inverters would resume inverter mode after the battery is charged to higher than 51Vdc as the cycles.

1 SbU
2 80amp
11 30amp
12 48v
13 51v
26 53.2v
27 53.2v

Setting 12:
The Program 01 is set to SBU. Hence, the inverter would only accept the AC grid power when the battery voltage is less than 46Vdc (in Setting 12). You could check the result by changing Program 01 to USb to check the result.

You should only need to change the control board with this Error code. The main board should be OK.

Error 61 means that the batteries are not communicating with the inverter, and the BMS is not installed successfully. There are a few reasons why:

  1. Incompatible batteries, the protocol can not communicate with the inverter
  2.  The right RJ45 serial BMS cables are not connected or it is wrongly designed
  3. The battery settings in the inverter menu 5 are not selected correctly.
  4. The dip switches on the master battery are not adjusted.

How can I resolve this error?

  1. Use the BMS cable that comes with the inverter (not with the battery), the supplier of the battery normally provides a generic RJ45 cable with a straight connection. For Voltacon off-grid inverters, use the BMS RJ45 serial cable with the correct pin layout: 3&5 pins on the inverter (P2) end, 7&8 pin on the battery (P1)

2. Use a custom-made RJ45 cable to connect the inverter and Lithium battery, turn on the Lithium battery, and ensure that the battery type is “PYL” in LCD program 5.

3. The BMS port is available on all Voltacon off-grid and hybrid inverters, if you do not have a BMS port please avoid using lithium batteries.

4. Dip Switch 1 is moved to the On position, and dip switches, 2,3,4 remain in default off-position

The 2nd ,3rd, 4th, nth batteries in the system must have the dip switches in the default position (OFF)

5. Connect Link Port1 from Master battery to Link Port 0 to the second battery. Repeat the wiring with the short RJ45 BMS/Straight cables until you wire all the batteries in the system. Notice the LINK PORT 0 of the master battery will remain UNUSED

NOTICE 1: Do not use the CAN BUS port on the battery, the Voltacon inverters communicate only via the RS485 serial port on the battery.

NOTICE 2: The Console port on the battery and COM port on the inverter are used for programming or remote monitoring of the parameters of the system

Tips & Tricks

This is a simple step-by-step guide on how to program your off-grid inverter to charge from the grid at specific hours. To use low-cost energy tariffs at night, it is important to adjust the settings of the inverter accordingly. This guide applies to Conversol Off-grid inverters MAX and MAX-II 7.2kW, 8kW, and 11kW.

This system does not require any paperwork or a special license to operate because the inverter is off-grid and does not feed back to the grid any power. When the batteries are low the grid will “see” the inverter as any other appliance in the house or as a charger that demands power. For that reason, this set up is free from complicated contracts with the electricity suppliers.

How the system works

  1. Charges from Solar First and then from Utility
  2. If the load exceeds the capacity of the inverter then the system goes in by-pass mode – The utility supplies all the power
  3. If the energy stored in batteries is low and power from solar is low too, the inverter will go in bypass mode. The grid will charge the batteries
  4. The timer will be set to charge from 12:30 to 4:30 am using the Octopus GO tariff (available in the UK)

To achieve the operations in steps 1-4 please follow the steps below

  1. Prog.01 SBU
  2. Prog.16 OSO – Only Solar
  3. Prog.99 USB 00 04 or 00 03 (It’s due to the Timer setting is based on “Hour”. 00 04 means 00:00AM~04:59AM is USB or 00 03 which means 00:00AM~03:59AM is USB)
  4. Enable auto restart when an overload occurs in menu 06

Prog.01 at SBU. When the battery voltage is less than the setting of Prog.12 then switch to Line mode. The charger source is defined in Prog.16. If you do not need the AC to charge the battery then set it to OSO. However, if the battery voltage is low and the battery BMS asks for forcing charging then the AC would still charge the battery for a period of time till the battery BMS stops forcing charging. If the SNU is selected in menu 16, then the AC will charge the battery in Line mode.

In SBU mode the inverter may return to AC Line Mode due to low battery voltage, then the PV energy will only be used to charge the batteries (if lithium batteries the voltage is around 53Vdc), until the next battery discharge cycle.

If the timer setting is set to SNU (solar and utility) for 12 04, it means it will charge from utility between 12 am to 4 am

You MUST set Prog.16 firstly then do the Timer setting later. 12 16 means 12:00 to 16:59 is SNU and out of this time slot is OSO

What happens after an overload condition?

If an overload is detected and the auto-reset function is disabled, the inverter will go into Line-Mode (back to the utility), this is a protection feature in case the overload is frequent and the inverter should stay in bypass until it is reset manually. To continue as normal back the battery/solar mode, the Over-Load function should be set to “auto reset automatically”. Check menu 06

Timer setting for charging 12am to 4am – Menu 99

The inverter is AC Line Mode. The grid charges the batteries

NOTICE CSO means the AC will charge the battery when PV is not available

Example with two different source priorities: SNU between 01 and 06 time then going to OSO between 07 to 00. It means the AC charger works within 01:00~06:59.

8kW Conversol MAX and MAX-II – Supply the loads from Solar and Utility at the same time
For the MAX series in SUB mode, the output load could be powered by PV+AC grid at the same time. But under this condition, the battery will not be able to be charged by PV or AC utility.

If the inverter is set to SUB mode, when PV is available, the output load will be power by PV+AC grid at the same time. Then the battery would not be able to be charged by PV or AC grid at that moment.

For the MAX series in SUB mode, the output load could be powered by PV+AC grid at the same time. But under this condition, the battery will not be able to be charged by PV or AC utility.

If the inverter is set to SUB mode, when PV is available, the output load will be power by PV+AC grid at the same time. Then the battery would not be able to be charged by PV or AC grid at that moment.

The answer is Yes, it is possible to create a system with US2000 and US3000 batteries in parallel. Pylontech BMS system will auto-adjust the charge current and voltage, protecting the batteries from over charge or high temperature.

Parameter settings – Master/Slave Configuration

In case you want to install two solar inverters at 5kW with a parallel communication card, they should still feed the power to a common battery bank.

If you use US2000 from Pylontech, the inverters have a compatible communication port with the BMS of the battery.

It is important to set one inverter as Master and the second inverter as Slave.

For the inverter without the BMS to Pylontech battery, please configure Program#5 to USE.

For BMS card of InfiniSolar models.

BMS Card US2000

4 8

5 7

My system is composed of 2 Pylontech US2000 Lithium Batteries and Conversol V5 Super Inverter

Settings on the inverter:
01 – SBU
05 – PYL
12 – 46.0V
13 – 51.0v
16 – SLb UdC – Solar energy provides power to the load first and disallows the utility to charge Battery

The problem is that this last setting (16) Won´t work without the battery reaching a determined amount of charge. I have already changed the setting 13 for a lower value that the battery has, for trying to the inverter change for Solar Energy, but nothing happened. Still charge the battery until they reach an amount (I think that the battery sends information to the inverter for let the inverter change for the condition choose on setting 16…)

If I have enough power delivered by solar energy panels, that can be used with the loads and charge the battery at the same time… but this situation doesn´t occur …. Until the Battery doesn´t reaches a determined amount of charge the inverter is bypassed from Utility.

In my other conversation ( before I had this new one ) when the amount of charge in the battery reached the value defined on the 13 setting parameter – The inverter changed for Solar Energy delivered to the loads and the rest of the power charged the battery.

Do I have to do another setting?

And if I don´t use the Ply Setting (5), and Choose – USE ( User- Defined), maybe the inverter change when reaching the amount…

What are the Settings that I have to do if i want to choose the USE ( User-Defined) Setting on the inverter?


If the inverter is made before 2018 the parameters are set manually. The WatchPower menu offers the option to set “user defined” batteries. Under this section, the battery’s charging and discharging parameters (i.e voltage and current) are:

Program/Menu Settings required for US2000
Program 02 Set to N*25A, N=battery amount
Program 05 Set to USE
Program 12 Set to 48V
Program 13 Set to 51V
Program 26 Set to 53.2V
Program 29 Set to 47.5V
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